protected void doMoveAirspaceLaterally( WorldWindow wwd, Airspace airspace, Point mousePoint, Point previousMousePoint) { // Intersect a ray throuh each mouse point, with a geoid passing through the reference // elevation. Since // most airspace control points follow a fixed altitude, this will track close to the intended // mouse position. // If either ray fails to intersect the geoid, then ignore this event. Use the difference // between the two // intersected positions to move the control point's location. if (!(airspace instanceof Movable)) { return; } Movable movable = (Movable) airspace; View view = wwd.getView(); Globe globe = wwd.getModel().getGlobe(); Position refPos = movable.getReferencePosition(); if (refPos == null) return; // Convert the reference position into a cartesian point. This assumes that the reference // elevation is defined // by the airspace's lower altitude. Vec4 refPoint = null; if (airspace.isTerrainConforming()[LOWER_ALTITUDE]) refPoint = wwd.getSceneController().getTerrain().getSurfacePoint(refPos); if (refPoint == null) refPoint = globe.computePointFromPosition(refPos); // Convert back to a position. refPos = globe.computePositionFromPoint(refPoint); Line ray = view.computeRayFromScreenPoint(mousePoint.getX(), mousePoint.getY()); Line previousRay = view.computeRayFromScreenPoint(previousMousePoint.getX(), previousMousePoint.getY()); Vec4 vec = AirspaceEditorUtil.intersectGlobeAt(wwd, refPos.getElevation(), ray); Vec4 previousVec = AirspaceEditorUtil.intersectGlobeAt(wwd, refPos.getElevation(), previousRay); if (vec == null || previousVec == null) { return; } Position pos = globe.computePositionFromPoint(vec); Position previousPos = globe.computePositionFromPoint(previousVec); LatLon change = pos.subtract(previousPos); movable.move(new Position(change.getLatitude(), change.getLongitude(), 0.0)); this.fireAirspaceMoved(new AirspaceEditEvent(wwd, airspace, this)); }